If your air conditioner is in the on position it will change the sound of the engine each time it cycles on and off (pulling more energy from the motor) to keep the cab at the temperature setting you have it on.
I have a 89 s-10 and I have to first push the rear window button then open the spare tire bar..u should see a knob now..turn it to the right and pull down and it should be good
Down Where The Buffalo Go was created on 1988-01-19.
The spark plug gap can cause the RPMs to fluctuate, while idling. The more probable cause of the fluctuating RPMs is a bad camshaft.
check your fuses under the dash and under the hood.
You need to adjust your idle speed on your carburator.
The Idle Air Control valve located in the throttle body.
Idle Air Control Valve....if this breaks you car wont idle properly....the rpm will go up then down all the time when idling
Is the S10 a 4x4?If not, measure everything and if it is correct Go for it
The best option for this is to go to the owner's manuel for your Blazer. If the fuse number is not listed there, contact your closest Auto Parts store.
Could be low on coolant or a faulty thermostat.
It could be a vacuum leak. The gasket under the throttle body was known to let go and create a large vacuum leak causing engine to idle high.
4x6 dash 5 1/2 front door 6 3/4 rear door cargo if equipped has 6x9